When cars were invented, the US Postal Service said goodbye to animal-powered deliveries forever--or did it? There's one town in the States that still receives their mail by mule Meet Anthony Paya, who leads a train of mules on a daily three-hour trek down into the Grand Canyon to bring mail to the townspeople of Supai. Full of authentic Western details about Paya's one-of-a-kind job and magnificent workplace, this beautifully illustrated...